LTC3708_15 Datasheet, PDF (6/32 Pages) Linear Technology – Fast 2-Phase, No RSENSE Buck Controller with Output Tracking

LTC3708
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Current Sense
Threshold vs V_RNG Voltage
350
300
250
200
150
100
50
0
0.5 0.75
1 1.25 1.5
V_RNG VOLTAGE (V)
1.75 2
3708 G13
Error Amplifier g_m
vs Temperature
1.6
1.5
1.4
1.3
1.2
1.1
1.0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3708 G16
Feedback Voltage vs RUN/SS
(Soft-Start)
700
600
500
400
300
200
100
0
1 1.25 1.5 1.75 2 2.25 2.5
RUN/SS VOLTAGE (V)
3708 G19
6
Maximum Current Sense
Threshold vs Temperature
160
V_RNG = 1V
150
140
130
120
110
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3708 G14
SENSE Pin Input Current
vs Temperature
150
140
130
120
110
I_SENSE–
100
I_SENSE+
90
80
70
60
50
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3708 G17
RUN/SS Latch-Off Thresholds
vs Temperature
4.0
3.5
LATCHOFF ENABLE
3.0
2.5
LATCHOFF THRESHOLD
2.0
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3708 G20
Load Regulation
(Figure 13 Circuit)
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
0
FORCED
CONTINUOUS
MODE
DISCONTINUOUS
MODE
3
6
9
12
15
LOAD CURRENT (A)
3708 G15
RUN/SS Pin Current
vs Temperature
3
2
PULL-DOWN CURRENT
1
0
PULL-UP CURRENT
–1
–2
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3708 G18
Undervoltage Lockout Threshold
vs Temperature
4.5
4.0
3.5
3.0
2.5
2.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3708 G21
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